Caledonian orogenic movements and metamorphism have been found not only in the Atlantic main zone from Scandinavia and Scotland but also along a continental zone which lies at angle to the main one; the two zones form limbs of a Y-shaped regional structure. The continental branch in this tectonic structure was developed roughly parallel to the SE-trending Tornquist Lineament which forms the south-western boundary of the East European Platform. The latter is one of three crustal plates bounding the European Caledonides.